CN220395002U - Double-steel-pipe hollow superposed column - Google Patents

Abstract

The utility model provides a double-steel-pipe hollow superposed column, which belongs to the technical field of building structure engineering and comprises the following components: an inner steel pipe, an outer steel pipe, a strip steel plate and a peg; the inner part of the inner steel pipe is of a hollow structure; the outer steel pipe is arranged at the outer side of the inner steel pipe, and interlayer concrete is poured between the outer steel pipe and the inner steel pipe; a plurality of holes are formed in the strip-shaped steel plates at equal intervals, and at least two strip-shaped steel plates are uniformly arranged on the outer wall of the outer steel pipe; the peg is arranged on the contact surface of the inner steel pipe and the interlayer concrete; wherein, external concrete is poured outside the outer steel pipe and the strip-shaped steel plate; the device is through setting up the cavity interior steel pipe to thereby the cooperation between reinforcing outside concrete and the intermediate layer concrete is avoided causing the waste of construction material to be equipped with the strip shaped steel board that has the hole at the contact surface of outside steel pipe and outside concrete.

Description

A double steel tube hollow composite column

Technical field

The utility model belongs to the technical field of building structure engineering, and specifically relates to a double steel tube hollow superposed column.

Background technique

At present, concrete filled steel tubes are widely used in building structural projects due to their advantages such as high bearing capacity, light weight, good seismic performance, and convenient construction. Among related technologies, some scholars have proposed a concrete-filled steel tube composite column structure. This structure is based on the concrete-filled steel tube structure and is wrapped with a layer of concrete. Therefore, compared with the concrete-filled steel tube column, the concrete-filled steel tube composite column has Better bearing capacity and stronger buckling resistance.

However, in actual engineering, concrete is a brittle material with poor tensile strength and easy to crack. Therefore, in the above technical solution, the damage of the concrete-filled steel tube composite column structure under the axial pressure of construction often begins with the external concrete. The outer concrete is the weakest part of the superimposed column. Due to its excellent mechanical properties, the internal steel tube concrete lags behind the outer reinforced concrete in destruction, resulting in a waste of construction materials.

Utility model content

Based on the above technical problems, the present utility model provides a double steel tube hollow stacked column. This device is provided with a hollow inner steel tube, and a strip steel plate with holes is provided on the contact surface between the outer steel tube and the external concrete to enhance the connection between the external concrete and the external concrete. The synergy between sandwich concrete avoids the waste of construction materials.

Its specific technical solutions are:

A double steel pipe hollow composite column, including: an inner steel pipe, an outer steel pipe, a strip steel plate and a bolt; the inner steel pipe is a hollow structure; the outer steel pipe is set outside the inner steel pipe, and is poured between the outer steel pipe and the inner steel pipe There is sandwich concrete; multiple holes are opened at equal intervals on the strip steel plate, and at least two strip steel plates are evenly arranged on the outer wall of the outer steel pipe; studs are set on the surface where the inner steel pipe contacts the sandwich concrete; among them, the outer steel pipe and The exterior of the strip-type steel panels is poured with external concrete.

In addition, a double steel tube hollow composite column in the above technical solution provided by the present invention can also have the following additional technical features:

In the above technical solution, a steel cage made of stirrups and longitudinal bars is provided on the outside of the outer steel pipe, and a concrete pouring formwork is set up on the outside of the steel cage, and external concrete is poured between the concrete pouring formwork and the outer steel pipe. .

In the above technical solution, the studs are evenly arranged on the surface of the inner steel pipe in a circumferential direction.

In the above technical solution, the number of strip steel plates is 8.

In the above technical solution, the number of pegs is 8.

In the above technical solution, the holes are elliptical holes.

In the above technical solution, the outer steel pipe and the strip steel plate are welded into an integrated structure.

In the above technical solution, the inner steel pipe and the outer steel pipe are placed concentrically.

In the above technical solution, the strip steel plates are evenly arranged on the upper edge of the outer steel pipe in the circumferential direction.

Compared with the existing technology, the utility model's double steel tube hollow composite column has the following beneficial effects:

1. The use of double steel pipes concentrically superimposed has better load-bearing capacity and stiffness. Since the interior is a hollow structure, it is light in weight and has better seismic performance; and by setting up strip steel plates and studs, the inner steel pipe is improved , the connection between the outer steel pipe and the concrete, and holes are provided on the strip steel plate, thereby improving the synergy between the outer concrete and the sandwich concrete and avoiding the waste of construction materials.

2. Set bolts at the inner steel pipe to avoid local inward buckling of the inner steel pipe under axial pressure.

Description of the drawings

Figure 1 is a schematic structural diagram of a double steel tube hollow stacked column of the present invention;

Figure 2 is a schematic structural diagram of the strip steel plate of the present invention;

Among them, the corresponding relationship between the reference signs and component names in Figures 1 to 2 is:

1 external concrete, 2 stirrups, 3 longitudinal bars, 4 strip steel plates, 5 external steel pipes, 6 sandwich concrete, 7 internal steel pipes, 8 studs, 9 holes.

Detailed ways

The utility model will be further described below with reference to specific implementation examples and accompanying drawings 1-2, but the utility model is not limited to these embodiments.

A double steel tube hollow composite column, as shown in Figure 1-2, includes: inner steel tube 7, outer steel tube 5, strip steel plate 4 and pegs 8; the inner steel tube 7 has a hollow structure inside; the outer steel tube 5 is set in A sandwich concrete 6 is poured on the outside of the inner steel pipe 7 and between the outer steel pipe 5 and the inner steel pipe 7; a plurality of holes 9 are provided at equal intervals on the strip-type steel plate 4, and at least two strip-type steel plates 4 are evenly arranged on the outer steel pipe. 5; the studs 8 are arranged on the surface where the inner steel pipe 7 contacts the sandwich concrete 6; among them, the outer concrete 1 is poured on the outside of the outer steel pipe 5 and the strip steel plate 4.

Using the above structure, the concentric superposition of double steel pipes has better load-bearing capacity and stiffness. Since the interior is a hollow structure, it is light in weight and has better seismic performance; and by setting the strip steel plate 4 and the studs 8, This improves the connection between the inner steel pipe 7, the outer steel pipe 5 and the concrete, and the strip steel plate 4 is provided with holes 9, thereby improving the synergy between the outer concrete 1 and the sandwich concrete 6 and avoiding the waste of construction materials. And since the inner steel pipe 7 supports the sandwich concrete 6, the inner steel pipe 7 is prone to buckling inward under the axial pressure during construction. Therefore, the studs 8 are provided at the inner steel pipe 7 to avoid The inner steel pipe 7 is prone to local inward buckling under the action of axial pressure.

Specifically, through the outer steel pipe 5 constraining the sandwich concrete 6 and the inner steel pipe 7 supporting the sandwich concrete 6, the structure has the properties of high load-bearing capacity, high stiffness and light weight.

In the embodiment of the present invention, a steel cage formed by binding stirrups 2 and longitudinal bars 3 is provided on the outside of the outer steel pipe 5, and a concrete pouring formwork is set up on the outside of the steel cage, and between the concrete pouring formwork and the outer External concrete 1 is poured between the steel pipes 5 .

By cladding it in reinforced concrete, the structure is made fire- and corrosion-resistant.

In the embodiment of the present invention, the studs 8 are evenly arranged on the surface of the inner steel pipe 7 in a circumferential direction.

The structure of the inner steel pipe 7 and the sandwich concrete 6 is strengthened by the studs 8 to avoid local buckling of the inner steel pipe 7 under the action of axial pressure.

In the embodiment of the present invention, the number of strip-shaped steel plates 4 is eight.

In the embodiment of the present utility model, the number of pegs 8 is eight.

In the embodiment of the present invention, the hole 9 is an elliptical hole 9 .

In the embodiment of the present invention, the outer steel pipe 5 and the strip steel plate 4 are welded into an integrated structure.

By making the outer steel pipe 5 and the strip-type steel plate 4 a welded integrated structure, the structural stability of the connection between the outer steel pipe 5 and the strip-type steel plate 4 is enhanced.

In the embodiment of the present invention, the inner steel pipe 7 and the outer steel pipe 5 are placed concentrically.

The concentric circle structure is used to give it good earthquake resistance.

In the embodiment of the present invention, the strip-shaped steel plates 4 are evenly arranged on the upper edge of the outer steel pipe 5 in the circumferential direction.

By arranging the strip-type steel plate 4 evenly on the upper edge of the outer steel pipe 5 in the circumferential direction, the strip-type steel plate 4 can disperse the force of axial compression, so that the overall structure can be evenly stressed, thereby avoiding the occurrence of the damage of the sandwich concrete 6 lagging behind the external concrete. 1 phenomenon.

Specifically, the construction process of double steel tube concentric superposed columns is:

1. Arrange the steel pipe skeleton of double-layer welded strip steel plates 4 and studs 8 placed concentrically;

2. Pour the sandwich concrete 6 between the inner steel pipe 7 and the outer steel pipe 5 to form a hollow sandwich steel pipe concrete;

3. Bind the external steel cage;

4. Set up external concrete 1 pouring formwork;

5. Pour exterior concrete1.

Implementation process: The concentric superposition of double steel pipes has better load-bearing capacity and stiffness. Since the interior is a hollow structure, it is light in weight and has better seismic performance; and by setting up strip steel plates 4 and bolts 8, The connection between the inner steel pipe 7, the outer steel pipe 5 and the concrete is improved, and the strip steel plate 4 is provided with holes 9, thereby improving the synergy between the outer concrete 1 and the sandwich concrete 6 and avoiding the waste of construction materials. And since the inner steel pipe 7 supports the sandwich concrete 6, the inner steel pipe 7 is prone to buckling inward under the axial pressure during construction. Therefore, the studs 8 are provided at the inner steel pipe 7 to avoid The inner steel pipe 7 is prone to local inward buckling under the action of axial pressure.

In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on that shown in the drawings. The orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. restrictions; the terms "connection", "installation", "fixing", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or a Can be connected indirectly through intermediaries. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the description of the present invention, the terms "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in the present invention. At least one embodiment or example of the utility model. In the present invention, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above descriptions are only preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (9)

1. A double steel pipe hollow composite column, comprising:

the inner steel tube is of a hollow structure;

the outer steel pipe is arranged at the outer side of the inner steel pipe, and interlayer concrete is poured between the outer steel pipe and the inner steel pipe;

the strip-shaped steel plates are provided with a plurality of holes at equal intervals, and at least two strip-shaped steel plates are uniformly arranged on the outer wall of the outer steel pipe;

the pin is arranged on the surface of the inner steel pipe, which is contacted with the interlayer concrete;

and external concrete is poured outside the outer steel pipe and the strip-shaped steel plate.

2. The double-steel-pipe hollow superposed column according to claim 1, wherein a steel reinforcement cage formed by binding hoops and longitudinal ribs is arranged on the outer side of the outer steel pipe, a concrete pouring template is erected on the outer side of the steel reinforcement cage, and external concrete is poured between the concrete pouring template and the outer steel pipe.

3. The double steel pipe hollow composite column according to claim 1, wherein the studs are circumferentially and uniformly arranged on the surface of the inner steel pipe.

4. A double steel pipe hollow composite column according to claim 1, wherein the number of strip steel plates is 8.

5. A double steel tube hollow composite column according to claim 1, wherein the number of pegs is 8.

6. The dual steel tube hollow composite column of claim 1, wherein the holes are oval holes.

7. The double-steel-tube hollow superposed column according to claim 1, wherein the outer steel tube and the strip-shaped steel plate are of a welded integrated structure.

8. A dual steel tube hollow composite column as claimed in claim 1 wherein said inner steel tube and said outer steel tube are concentrically disposed.

9. The double-steel-tube hollow superposed column according to claim 1, wherein the strip-shaped steel plates are uniformly arranged on the upper edge of the outer steel tube in the circumferential direction.